CN1997741A - 新的螨变应原 - Google Patents
新的螨变应原 Download PDFInfo
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- CN1997741A CN1997741A CNA2005800188467A CN200580018846A CN1997741A CN 1997741 A CN1997741 A CN 1997741A CN A2005800188467 A CNA2005800188467 A CN A2005800188467A CN 200580018846 A CN200580018846 A CN 200580018846A CN 1997741 A CN1997741 A CN 1997741A
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- mite allergen
- mite
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- seq
- reorganization
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Abstract
安全和有效的不含诱导过敏的杂质的变应原,其作为螨变态反应性疾病的治疗剂或诊断剂。提供了以下重组蛋白:(a)由SEQ ID NO:2或35所示氨基酸序列组成的蛋白;或(b)包含通过对SEQ ID NO:2或35所示氨基酸序列缺失、取代或添加一个或几个氨基酸而得到的氨基酸序列的蛋白,其具有螨变应原活性。
Description
技术领域
本发明涉及具有变应原活性的重组螨变应原,具体涉及导致狗特应性的螨变应原。本发明进一步涉及编码变应原的基因、使得基因能够表达的表达载体、通过用表达载体转化获得的转化体、制备重组螨变应原的方法、螨变态反应性疾病的治疗剂,和螨变态反应性疾病的诊断剂。
背景技术
已知屋尘螨是诸如特应性皮炎和支气管哮喘的变态反应性疾病的主要原因。常规地,使用变态反应的致病物质作为治疗剂的脱敏治疗被认为是最重要的基本治疗方法。具体地,对诸如花粉病、屋尘螨变态反应和真菌性变态反应的疾病广泛进行了脱敏治疗,这些疾病是难以避免的诸如吸入的变应原的抗原诱导的。但是,由于致敏抗原的作用,脱敏治疗涉及过敏的危险,因此,需要施用安全的治疗性抗原。正在研究所述安全的致敏抗原。
至于螨变态反应性疾病,报道了两种类型的螨,即屋尘螨(Dermatophagoides pteronyssinus)和粉尘螨(Dermatophagoides farinae)是屋尘中的变应原来源(参见非专利文件1和2)。从这些螨分离了主要的螨变应原。已知这些螨变应原是分子量为24kD-28kD的糖蛋白(pI 4.6-7.2)和/或包含在螨排泄物中的分子量为14.5kD-20kD的蛋白(pI 5-7.2)和/或螨体(参见非专利文件3-7)。
至于螨变应原基因,克隆了屋尘螨的主要变应原Der p 1(分子量:25,371)和Der p 2(分子量:14,131)以及粉尘螨的主要变应原Der f 1(分子量:25,191)和Der f 2(分子量:14,021),也确定了它们的核苷酸序列(参见非专利文件8-15)。也制备了基于这些变应原的重组变应原,进行了涉及这些变应原的研究。此外,也报道了Der f 3,即一种分子量为大约30,000的变应原的核苷酸序列(参见非专利文件16)。此外,作为螨变应原,也报道了ma10、ma3、ma15、ma29、ma44、ma50、ma113、ma114和ma115(参见专利文件1)。此外,也报道了表现与抗-Der f 2血清的强交叉反应性的ma124(参见专利文件2)。
此外,报道了98-kDa Der f 15、109-kDa Der f 15(参见非专利文件17)和60-kDa Der f 18(参见非专利文件18)在狗中是与IgE强反应的变应原。
作为诊断螨变态反应性疾病的方法,常规将皮内反应测试作为主流方法,该方法基于患者的病史,并且使用屋尘螨提取物和/或螨体提取物。该方法与涉及血清IgE抗体滴度(相对值)测量的RAST(放射变应原吸附测试)方法、吸入诱导测试和鼻粘膜刺激测试等组合。但是,直接诊断螨变态反应性疾病仍然非常困难。
常规进行了支气管哮喘的脱敏治疗方法,该方法采用屋尘提取物和屋尘螨作为特异性变应原。但是,还没有成功分析屋尘的组成。此外,屋尘含有很多类型的可以诱导过敏的杂质。因此,在这些情况下,屋尘的剂量是非常有限的。因此,常规脱敏治疗的效果是非常低水平的。因此,需要用于脱敏治疗的更有效和更安全的抗原。公知的是有效用于脱敏治疗的变应原存在于螨的高分子量粗排泄物的级份中。由这些级份,不能获得足够用于脱敏治疗的量的螨变应原。因此,采用涉及从通过饲养螨获得的产物提取和纯化螨变应原的方法,获得用于治疗的抗原的稳定供应是困难的。此外,如上文的描述,常规报道了用基因重组技术制备多种重组螨变应原。但是,不能说这些变应原对于实际治疗总是有效的。需要提供具有更有效的、新的和更高的螨变应原活性的重组螨变应原。
专利文件1 日本专利公开(Kokai)No.7-112999 A(1995)
专利文件2 日本专利公开(Kokai)No.7-278190 A(1995)
非专利文件1 Allerg.Asthma,10,329-334(1964)
非专利文件2 J.Allergy,42,14-28(1968)
非专利文件3 J.Immunol.,125,587-592(1980)
非专利文件4 J.Allergy Clin.Immunol.,76,753-761(1985)
非专利文件5 Immunol.,46,679-687(1982)
非专利文件6 Int.Arch.Allergy Appl.Immunol.,81,214-223(1986)
非专利文件7 J.Allergy Clin.Immunol.,75,686-692(1985)
非专利文件8 Int.Arch.Allergy Appl.Immunol.,85,127-129(1988)
非专利文件9 J.Exp.Med.,167,175-182(1988)
非专利文件10 J.Exp.Med.,170,1457-1462(1989)
非专利文件11 Int.Arch.Allergy Appl.Immunol.,91,118-123(1990)
非专利文件12 Int.Arch.Allergy Appl.Immunol.,91,124-129(1990)
非专利文件13 Jpn.J.Allergol.,39,557-561(1990)
非专利文件14 Clinical and Experimental Allergy,21,25-32(1991)
非专利文件15 Clinical and Experimental Allergy,21,33-37(1991)
非专利文件16 FEBS Lett.,377,62-66(1995)
非专利文件17 Vet.Immunol.Immunopathol,78,231-247(2001)
非专利文件18 J.Allergy Clin.Immunol,112,79-86(2003)
发明内容
本发明的一个目的是提供不含诱导过敏的杂质的安全和有效的重组螨变应原,作为螨变态反应性疾病的治疗剂或诊断剂。更具体地,本发明的目的是提供来源于螨体的基因,并且提供使得基因能够表达的表达载体。本发明的另一目的是提供具有变应原活性的新的螨变应原,其是通过表达来源于螨体的基因而获得的。本发明的进一步的目的是提供含有重组螨变应原作为活性成分的螨变态反应性疾病的新治疗剂,并且提供含有重组螨变应原的螨变态反应性疾病的新诊断剂。
作为广泛研究以实现上述目的结果,发明人发现了新的螨变应原,并且发现该变应原在脱敏治疗中发挥极佳的作用。因此,发明人完成了本发明。
具体地,本发明的描述如下:
[1]以下重组螨变应原(a)或(b):
(a)包含SEQ ID NO:2或35所示氨基酸序列的重组螨变应原;或
(b)包含通过对SEQ ID NO:2或35所示氨基酸序列缺失、取代或添加一个或几个氨基酸而得到的氨基酸序列,并且具有螨变应原活性的重组螨变应原。
[2]编码以下螨变应原(a)或(b)的基因:
(a)包含SEQ ID NO:2或35所示氨基酸序列的螨变应原;或
(b)包含通过对SEQ ID NO:2或35所示氨基酸序列缺失、取代或添加一个或几个氨基酸而得到的氨基酸序列,并且具有螨变应原活性的螨变应原。
[3]包含以下DNA(c)或(d)的基因:
(c)包含SEQ ID NO:1或34所示核苷酸序列的DNA;或
(d)在严格条件下与包含特定序列的DNA杂交,并且编码具有螨变应原活性的蛋白的DNA,所述特定序列与包含SEQ ID NO:1或34所示核苷酸序列的DNA的序列互补。
[4]根据[1]的螨变应原的片段肽。
[5]根据[4]的片段肽,其包含含有SEQ ID NO:3-SEQ ID NO:19所示氨基酸序列中的至少一个序列的氨基酸序列。
[6]螨变应原的片段基因,其编码[4]或[5]的片段肽。
[7]重组载体,其包含[2]或[3]的基因或[6]的片段基因。
[8]融合蛋白,其由[1]的螨变应原和另一种蛋白组成。
[9]用[7]的表达载体转化的细菌、酵母、昆虫或动物细胞。
[10]生产重组螨变应原的方法,该方法包括在可以表达基因的条件下培养[9]的细菌、酵母、昆虫或动物细胞,导致细胞产生重组螨变应原,然后收获重组螨变应原。
[11]生产重组螨变应原的方法,该方法包括在可以表达基因的条件下培养[9]的细菌、酵母、昆虫或动物细胞,导致细胞产生融合重组螨变应原,收获融合重组螨变应原,然后除去与变应原融合的另一种蛋白。
[12]螨变态反应性疾病的治疗剂,其含有[1]的重组螨变应原、[4]的片段肽或[8]的融合蛋白作为活性成分。
[13]螨变态反应性疾病的诊断剂,其含有[1]的重组螨变应原、[4]的片段肽或[8]的融合蛋白作为活性成分。
[14]抗[1]的螨变应原的抗体。
[15]根据[14]的抗螨变应原的抗体,其是单克隆抗体。
[16]杂交瘤,其产生[15]的单克隆抗体。
[17]屋尘中的螨变应原的免疫测定方法,其使用[14]-[16]的任意一项的抗体。
[18]根据[17]的屋尘中的螨变应原的免疫测定方法,其是ELISA法。
说明书包括了本申请的优先权文件日本专利申请No.2004-116089的说明书和/或附图中公开的部分或所有内容。
附图说明
图1是表示重组狗FcεRIα链的电泳结果的照片。
图2是表示重组狗FcεRIα链与IgE的结合的照片。
图3显示检测粉尘螨特异性IgE的结果。
图4是显示用重组狗FcεRIα链进行Western印迹分析的结果的照片。
图5是显示从粉尘螨提取的抗原的2-D(二维)电泳图样的照片。
图6显示的照片显示了粉尘螨变应原蛋白的2-D(二维)电泳和Western印迹分析的结果。
图7-1显示了Zen1基因的部分核苷酸序列和氨基酸序列。
图7-2显示了Zen1基因的部分核苷酸序列和氨基酸序列(续图7-1)。
图8-1显示了Zen1基因的全长cDNA核苷酸序列和氨基酸序列。
图8-2显示了Zen1基因的全长cDNA核苷酸序列和氨基酸序列(续图8-1)。
图8-3显示了Zen1基因的全长cDNA核苷酸序列和氨基酸序列(续图8-2)。
图8-4显示了Zen1基因的全长cDNA核苷酸序列和氨基酸序列(续图8-3)。
图9是显示用大肠杆菌制备然后纯化的重组Zen1的SDS-PAGE结果的照片。
图10是显示通过抗Zen1多克隆抗体的Western印迹分析的反应结果的照片。泳道1显示重组Zen1的结果,用的2显示螨体的结果。
图11是显示ELISA分析的重组Zen1与IgE的反应性结果的照片。
实施本发明的最佳方式
下面详细描述本发明。
(1)分离螨变应原Zen1蛋白和确定其部分序列
用获自临床诊断为具有螨变态反应的动物的螨变应原特异性IgE确定螨变态反应。具体地,用含有例如螨变应原特异性IgE、螨提取物、识别病原体特异性IgE的IgE受体的血清,通过Western印迹鉴定螨变应原。可以通过公知的方法鉴定变应原。
由此鉴定的本发明的新的螨变应原是一种Zen1蛋白,分子量为150kDa-200kDa。
可以通过进行电泳,然后从螨变应原斑点提取螨变应原而分离鉴定的螨变应原。此时,需要进行2-D(二维)电泳,以便与其它蛋白完全分离。
用由此提取的螨变应原,可以通过公知的方法确定部分序列。公知的确定部分序列的方法的实例包括基于MS/MS和肽作图的从头测序。
(2)通过RT-PCR制备cDNA克隆
可以通过从螨提取mRNA,用mRNA作模板合成螨变应原cDNA,构建cDNA文库,然后筛选靶,获得编码本发明的螨变应原的DNA。
所述mRNA的供应源是螨体,螨优选是粉尘螨、屋尘螨等,它们是屋尘螨。但是,其实例不限于此。通过常用技术可以制备所述mRNA。由此获得的mRNA作为模板,基于上文(1)中获得的序列信息设计引物,然后合成编码螨变应原的cDNA片段。将由此获得的片段亚克隆到合适的载体如pGEM(由Promega生产)。然后通过诸如循环测序方法的标准方法确定核苷酸序列。
SEQ ID NOS:3-19示出了本发明的螨变应原的部分氨基酸序列。其中,通过从头测序确定了SEQ ID NOS:3-7中所示的序列。N末端氨基酸序列示于SEQ ID NO:19。通过肽作图确定了SEQ ID NOS:8-18中所示的序列。
本发明包括螨变应原,它包含的氨基酸序列包含至少一个SEQ IDNOS:3-19所示的氨基酸序列,这些序列代表作为螨变应原的Zen1蛋白的片段。
编码作为本发明的螨变应原的Zen1蛋白的Zen1基因的DNA的部分核苷酸序列示于SEQ ID NO:1,其全长核苷酸序列示于SEQ ID NO:34。作为本发明的螨变应原的Zen1蛋白的部分氨基酸序列示于SEQ IDNO:2,其全长氨基酸序列示于SEQ ID NO:35。
只要包含所述氨基酸序列的蛋白具有螨变应原活性,在氨基酸序列中可以发生至少一个,优选一个或几个氨基酸的缺失、取代或添加。
例如,可以缺失SEQ ID NO:2或SEQ ID NO:35所示氨基酸序列的至少一个,优选一个或几个(如1-10,进一步优选1-5个)氨基酸。可以在SEQ ID NO:2所示氨基酸序列中添加至少一个,优选一个或几个(如1-10,进一步优选1-5个)氨基酸。或者,可以用其它氨基酸取代SEQ ID NO:2所示氨基酸序列中的至少一个,优选一个或几个(如1-10,进一步优选1-5个)氨基酸。
通过对SEQ ID NO:2或SEQ ID NO:35所示氨基酸序列缺失、取代或添加一个或几个氨基酸而得到的所述氨基酸序列包括与SEQ IDNO:2或SEQ ID NO:35的氨基酸序列具有至少85%或更多,优选90%或更多,进一步优选95%或更多,特别优选97%或更多同源性的序列,所述同源性例如是用BLAST(Basic Local Alignment Search Tool at theNational Center for Biological Information),采用最初设置的缺省参数计算的。
具有通过对SEQ ID NO:2或SEQ ID NO:35所示氨基酸序列缺失、取代或添加一个或几个氨基酸而得到的所述氨基酸序列的蛋白与具有SEQ ID NO:2或SEQ ID NO:35的氨基酸序列的蛋白基本相同。
此外,本发明的基因的实例也包括能够在以下条件下与包含特定序列的DNA杂交,并且编码具有螨变应原活性的蛋白的DNA,所述特定序列与具有上述SEQ ID NO:1或SEQ ID NO:34所示DNA序列的基因的序列互补。具体地,所述条件使得能够用固定了DNA的滤器在68℃下0.7M-1.0M NaCl存在下杂交,并且在68℃下用0.1-2×SSC溶液(1×SSC包含150mM NaCl和15mM柠檬酸钠)洗涤,从而进行鉴定。或者,本发明的基因是当通过Southern印迹方法转移并固定在硝酸纤维素膜上,然后42℃下在杂交缓冲液(50%甲酰胺,4×SSC,50mM HEPES(pH 7.0),10×Denhardt’s溶液,和100μg/ml鲑鱼精子DNA)中反应过夜时能形成杂交体的DNA。
此外,本发明还包括相应于上述DNA的RNA,或能够在严格条件下与该RNA杂交,并且编码具有螨变应原活性的蛋白的RNA。
可以通过将本发明的基因连接(插入)到合适的载体中而获得本发明的重组载体。用于插入本发明的基因的载体不是特别限定的,只要它们能够在诸如细菌、酵母或动物细胞的宿主中复制。所述载体的实例包括质粒DNA和噬菌体DNA。用于构建表达载体的载体DNA是广泛普及并且容易获得的。所述载体DNA的实例包括pUC19和pTV118 N(由Takara Shuzo生产)、pUEX2(由Amersham生产)、pGEX-4T,和pKK233-2(由Pharmacia生产),以及pMAM-neo(由Clontech生产)。
构建本发明的所述表达载体的方法并不受到特别的限制,并且可以根据标准方法进行。例如,可以将EcoR I消化的螨变应原cDNA片段插入质粒pUC19多克隆位点中的EcoR I位点。此外,可以将该片段连接于质粒载体pGEX-4T的EcoR I位点,使得能够获得表达载体。
用本发明的所述表达载体转化的细菌、酵母或动物细胞不受特别的限制,只要它们能够表达本发明的基因。所述细菌的实例包括大肠杆菌和枯草芽孢杆菌。所述酵母的实例包括啤酒糖酵母等。所述动物细胞的实例包括中国仓鼠卵巢(CHO)细胞、Sf21和Sf9细胞,它们是Mamestra brassicae卵巢细胞、猴COS细胞和小鼠成纤维细胞。
本发明的重组螨变应原的实例包括直接表达的螨变应原和表达为与其它蛋白的融合蛋白的那些。下文中,所述融合蛋白称作融合重组螨变应原。形成所述融合蛋白的其它蛋白的实例包括,但不特别限定于β-半乳糖苷酶、谷胱甘肽S-转移酶、蛋白A和麦芽糖结合蛋白。
本发明的重组螨变应原也可是仅仅由对变应原活性关键的区域组成的肽片段或包含对变应原活性关键的区域的肽片段。此外,除了通过表达单独的螨变应原蛋白获得的产物,可以通过除去其它蛋白,从表达为融合蛋白的产物获得所述重组螨变应原。
具体地,通过表达来源于螨体的基因获得本发明的重组螨变应原,它是具有螨变应原活性的蛋白。此处,“具有螨变应原活性”是指能够在哺乳动物中诱导变态反应。
可以通过以下方法生产本发明的螨变应原。在完成上述转化株的培养后,收获微生物体,悬浮于含有多种蛋白酶抑制剂的缓冲液中,然后通过超声处理进行破碎。用含有诸如苯基甲磺酰氟、一碘乙酸、抑胃酶肽A或乙二胺四乙酸的蛋白酶抑制剂和诸如十二烷基硫酸钠(SDS)、triton X-100或Nonidet P40的表面活性剂的缓冲液提取细胞碎屑中的定位于膜的蛋白。通过采用固定的谷胱甘肽的亲和层析、采用固定的抗螨抗体的亲和层析等,纯化从提取物或培养物浓度物获得的由螨变应原和谷胱甘肽S-转移酶组成的融合蛋白。此外,固定了谷胱甘肽的载体是由Pharmacia生产的载体。此外,固定了抗螨抗体的载体是通过将兔抗螨抗体与活化的Tresyl载体(如,Tresyl GM凝胶(由Kurita Water Industries生产),Tresyl Toyopearl(由Tosoh生产)和Tresyl sepharose(由Pharmacia生产))共价结合而制备的载体。此外,可以获得由螨变应原和His标志(如6×His)组成的融合蛋白,然后用固定了金属的亲和珠等进行纯化。
用蛋白酶消化纯化的融合重组螨变应原,然后通过单个或组合的公知纯化方法进行分级分离,同时用ELISA和螨变态反应性疾病患者的白细胞组胺释放测定(Allergy 37,725(1988))进行监测,所述纯化方法包括凝胶过滤层析、超滤、离子交换层析、亲和层析、疏水层析、层析聚焦、等电聚集法和凝胶电源法。
本发明还包括含有螨变应原作为活性成分的螨变态反应性疾病治疗剂。所述治疗剂用作多种类型的螨变态反应性疾病的治疗剂。此处,“螨变态反应性疾病”包括所有由螨特异性抗原导致的变态反应性疾病,如特应性支气管哮喘、变态反应性鼻炎、变态反应性结膜炎和特应性皮炎。
可以通过例如以下方法制备本发明的螨变态反应性疾病的治疗剂:干燥通过上述方法纯化的重组螨变应原或其片段肽,收获粉末形式的所述变应原或片段肽,然后制备螨变态反应性疾病的治疗性脱敏剂。但是,该方法不特别限于此。当将本发明的螨变态反应性疾病的治疗剂用作治疗性脱敏剂时,可以直接使用该试剂,或如果必要,用作通过标准方法提供的与通常使用的佐剂和多种添加剂的联合药物,所述佐剂和多种添加剂如稳定剂、附形剂、增溶剂、乳化剂、缓冲剂、润滑剂、防腐剂和着色剂。例如,将粉末形式的纯化的重组螨变应原溶解于补加了苯酚的生理盐水中,然后用作抗原的储液,用于脱敏治疗。
可以通过常规施用途径,如经皮、口服、皮内、皮下、肌内和腹膜内施用方法施用本发明的螨变态反应性疾病的治疗剂。此外,本发明的治疗剂也可以用于经皮或经粘膜药物,如锭剂、舌下含片、滴眼液、鼻内喷雾剂、泥敷剂、乳膏和洗剂。此外,施用本发明的螨变态反应性疾病的治疗剂的剂量和施用次数可以根据施用途径、症状等进行合适的选择,使得对于成人,剂量在每次施用大约20μg或更少的范围内。每周一次或几次进行施用。
此外,本发明的螨变态反应性治疗剂不仅用作抗螨变态反应性疾病的治疗剂,也可以用作抗该疾病的预防剂。此外,本发明的螨变态反应性疾病治疗剂可以安全用于人体,而不产生过敏诱导作用。
本发明的螨变态反应性诊断剂用作诊断抗螨变态反应性疾病的皮内反应的试剂或诊断螨变态反应的滴定剂。当将诊断剂用作诊断皮内反应的诊断剂时,通过制备通过根据标准方法的上述方法纯化的重组螨变应原或其片段肽而获得该试剂。例如,将重组螨变应原干燥并制成粉末,将粉末溶解并稀释于含有苯酚的生理盐水,然后使用。采用诊断剂作为诊断皮内反应的试剂的方法是根据标准方法使用的。
此外,当将诊断剂用作诊断螨变态反应的滴定剂时,类似地通过标准方法制备该试剂。例如,将重组螨变应原或其片段肽合适地溶解并稀释于Hank’s缓冲液,将得到的溶液用作组胺释放滴定试剂。该方法通常是通过以下程序进行的。具体地,将螨变态反应性疾病患者的血液或通过离心从患者血液获得的血细胞级份悬浮于缓冲液中。用重组螨变应原作为滴定剂,对固定量的血细胞悬浮液进行滴定。用HPLC测量通过变应原刺激从嗜碱性细胞释放的组胺量[Allergy 37,725(1988)]。
在组胺释放滴定中,基于最大释放量的50%(滴定曲线的反曲点)确定组胺的释放量。具体地,该滴定的特征在于:(1)根据血细胞悬浮液的滴度直接测量患者的变应原敏感性;和(2)在将血浆与重组螨变应原预反应后,通过用反应溶液对血细胞进行滴定获得的值(血液滴定曲线值)通常高于通过用重组螨变应原对血细胞悬浮液进行滴定获得的值(血细胞悬浮液滴定曲线值)。这是由于血浆中能够中和变应原的IgG抗体(封闭抗体)的存在。因此,可以根据血液滴定曲线从血细胞悬浮液滴定曲线偏移的程度获得封闭抗体滴度。变应原敏感性和该封闭抗体滴度使得能够实现准确的螨变态反应诊断。该组胺释放滴定测试也可以用于监测脱敏治疗的效果。
本发明也包括抗本发明的螨变应原的抗体或其片段肽。所述抗体可以通过公知方法作为多克隆抗体或单克隆抗体获得。所述抗体可以用于测量屋尘中螨变应原的存在、不存在等。所述测量可以用公知的免疫学方法如ELISA进行。在所述测量后,从屋尘中提取蛋白,然后测量。
此外,表达了本发明的重组螨变应原蛋白。通过用如此表达的重组蛋白进行测试,如特异性IgE反应测试或用螨变态反应患者狗进行的皮内反应测试,可以证实本发明的螨变应原蛋白的变应原蛋白功能。
将在下面的实施例中进一步描述本发明。这些实施例不意欲限制本发明的范围。
此外,除非特别指出相反的意思,用于每个实施例的试剂是从Nacalai Tesque,Wako Pure Chemical Industries,Sigma,Difco等购买的商业化试剂。此外,用于基因工程的试剂,如限制酶,是从Takara Shuzo,Toyobo,Invitrogen等购买的,然后根据制造商的说明书进行使用。
[实施例1]建立IgE检测系统
通过PCR扩增狗高亲和力IgE受体α链(FcεRIα)cDNA的细胞外区,排除其信号肽位点,并且加入了限制酶EcoR I和Xho I位点。用T4-DNA连接酶将所得物连接到大肠杆菌表达质粒载体pGEX4T-1(由Amersham Biosciences生产)的EcoR I和Xho I位点。用由此获得的重组质粒转化大肠杆菌TOP10菌株(由Invitrogen生产)。在含有氨苄青霉素(100μg/mL)的LB培养基中将转化的菌株37℃下培养过夜。随后,在新的LB培养基上传代培养小量菌株,直到600nm处的OD值达到1.0。随后,添加IPTG(异丙基-1-硫-β-D-半乳糖苷),达到1mM的终浓度。3小时后,收获细胞,然后用PBS(pH 7.4)清洗一次。通过在PBS(pH 7.4)中超声处理而裂解再次收获的细胞,通过离心除去不溶的级份,然后收集含有与谷胱甘肽S-转移酶(GST)融合的狗FcεRIα的可溶级份。随后,用谷胱甘肽琼脂糖凝胶4B柱(由Amersham Biosciences生产)从可溶级份获得与GST融合的狗FcεRIα。从10升培养溶液获得1.0mg融合蛋白(GST-FcεRIα)。证实了获得的纯化GST-FcεRIα在SDS-PAGE后显示出单个45kDa的条带(图1)。将重组的狗IgE(由BETHYL生产)和纯化的狗IgG固定在免疫板(由Nalge NuncInternational生产)上,采用从1.0μg,0.1μg,0.05μg,0.025μg,0.0125μg,以及然后0.00625μg的2倍系列稀释,以便证实纯化的GST-FcεRIα的反应性。证实了纯化的GST-FcεRIα与IgE反应,但不与IgG反应(图2)。将从粉尘螨提取的4.0μg抗原(由GREER生产)固定在免疫板(由Nalge Nunc International生产)上。使粉尘螨阳性狗血清(通过用生理盐水稀释50倍的粉尘螨抗原溶液(由GREER生产)进行皮内反应证实为粉尘螨阳性的狗血清)与抗原反应。然后加入生物素标记的GST-FcεRIα。此外,基于添加过氧化物酶偶联的链亲和素(由Jackson Immuno Research生产)和底物导致的显色反应,证实了GST-FcεRIα链识别螨变应原特异性IgE(图2)。此外,将从粉尘螨提取的4.0μg抗原(由GREER生产)固定在免疫板(由Nalge NuncInternational生产)上。使通过用提取自粉尘螨的抗原免疫而获得的狗血清与抗原反应。证实GST-FcεRIα不与56℃下热处理1小时的粉尘螨阳性狗血清反应,也不与纯化的狗IgG反应,但与重组的狗IgE(由BETHYL生产)反应。认为GST-FcεRIα识别变应原特异性IgE(图3)。在图3中,“-”表示血清没有在56℃下处理1小时,“+”表示血清在56℃下处理1小时,“cont.”表示未免疫的血清。
[实施例2]通过Western印迹分析螨的主要变应原
用8只狗的血清和血浆样品进行Western印迹分析。这8只狗发生了特应性皮炎,并且诊断患有螨变态反应,该诊断是基于用从粉尘螨变应原(由GREER生产)提取的抗原溶液进行的皮内反应和采用实施例1中产生的重组狗FcεRIα链进行的ELISA法。将β-巯基乙醇加入从粉尘螨提取的抗原的100.0μg溶液,达到50.0μL/mL的终浓度。加入200μL由此制备的Laemmli样品缓冲液(由BIO-RAD生产),然后100℃下热处理5分钟。将所得物加样到凝胶浓度为5%-20%的聚丙烯酰胺凝胶(PAGEL;由ATTO生产)上,然后进行电泳。完成电泳后,将所得物转移到PVDF膜(Hybond-P;由Amersham Biosciences生产)。使膜在封闭溶液(补加了5%脱脂奶的PBST(通过将Tween20添加到PBS中达到0.1%的终浓度而制备))中4℃下静置过夜。在PBST中将膜清洗10分钟,在封闭溶液中将每份狗血清或血浆样品稀释10倍。将每个稀释的溶液样品加入到膜,然后在室温下反应3小时。用PBST清洗3次(每次10分钟)。用封闭溶液稀释生物素标记的狗FcεRIα,然后将稀释的溶液加入膜,随后在室温下反应2小时。用PBST清洗3次(每次10分钟),将用PBST稀释10,000倍的链亲和素-HRP偶联物(由Amersham Biosciences生产)加入膜,然后室温下反应1小时。用PBST清洗5次(每次10分钟)后,将ECL Plus Western印迹检测系统(由Amersham Biosciences生产)的反应溶液加入到膜上,然后在室温下反应5分钟。然后,用X射线膜(Hyperfilm ECL;由Amersham Biosciences生产)检测信号。结果,在相应于分子量150kDa的条带和相应于分子量250kDa的条带之间检测到了表现强反应的蛋白(图4)。在图4中,用箭头表示的条带相应于表现出强反应,并且分子量为150kDa-250kDa的蛋白。在图4中,从1-8的数字分别表示8只狗,“ct.”表示阴性血清。
[实施例3]通过2-D(二维)电泳分析螨变应原蛋白
通过2-D(二维)电泳分离与IgE强反应的分子量为150kDa-250kDa的变应原蛋白。用Protean IEF细胞(由BIO-RAD生产)进行2-D(二维)电泳。将1.0mg从粉尘螨提取的抗原(由GREER生产)溶解于1.0mL的膨胀缓冲液(2-D起始试剂盒;由BIO-RAD生产)。在活性条件下(50V,20℃和12小时)用17cm长的IPG Ready strip凝胶(pH 4-7;由BIO-RAD生产)和聚焦盘使300μL由此获得的溶液膨胀。膨胀后,在以下条件下进行聚焦。首先,在步骤1(250V,20分钟,20℃)进行除去过量盐的程序。在步骤2,电压从250V升高到10,000V,共6小时。在步骤3,用10,000V的电压和总共60,000VH的电压时进行聚集。在2-D(二维)电泳前,用SDS-PAGE平衡缓冲液I(6M尿素,0.375MTris pH 8.8,2%SDS,20%甘油,和2%(w/v)DTT;由BIO-RAD生产)将IPG ready strip凝胶轻柔振荡10分钟。随后,用SDS-PAGE平衡缓冲液II(6M尿素,0.375M Tris pH 8.8,2%SDS,20%甘油,和2.5%(w/v)碘乙酰胺;由BIO-RAD生产)进一步将凝胶轻柔振荡10分钟,从而进行平衡。用1%(v/w)低熔点琼脂糖(由BIO-RAD生产)将平衡的IPGready strip凝胶紧密附着于PII ready凝胶(8-16%;由BIO-RAD生产)。用40mA的恒定电流(起始电压是135V,最终电压是400V)电泳大约3小时。电泳后,用Bio-Safe(由BIO-RAD生产)对凝胶染色,由此可以对蛋白斑点进行图样分析(图5)。
[实施例4]通过Western印迹分析而鉴定变应原斑点
2-D(二维)电泳后,将蛋白斑点转移到PVDF膜(Hybond-P;由Amersham Biosciences生产)。使膜在封闭溶液(补加了5%脱脂奶的PBST(通过将Tween20添加到PBS中达到0.1%的终浓度而制备))中4℃下静置过夜。在PBST中将膜清洗10分钟,在封闭溶液中将狗血清或血浆样品稀释10倍。将由此稀释的溶液加入到膜,然后在室温下反应3小时。用PBST清洗3次(每次10分钟),用封闭溶液稀释生物素标记的狗FcεRIα。将稀释的生物素标记的狗FcεRIα加入膜,随后在室温下反应2小时。用PBST清洗3次(每次10分钟),将用PBST稀释10,000倍的链亲和素-HRP偶联物(由Amersham Biosciences生产)加入膜。室温下反应1小时。用PBST清洗5次(每次10分钟)后,将ECL Plus Western印迹检测系统(由Amersham Biosciences生产)的反应溶液加入到膜上,然后在室温下反应5分钟。用X射线膜(Hyperfilm ECL;由Amersham Biosciences生产)检测信号。结果,在pH约4.5,在相应于分子量150kDa的条带和相应于分子量250kDa的条带之间检测到了表现强反应的斑点。由此,获得了相应于本发明的变应原蛋白(Zen1)的斑点(图6)。在图6中:左上图6-1显示了粉尘螨的2-D(二维)电泳图样(pH 4-7);右上图6-2显示了用发生特应性皮炎的狗患者的粉尘螨阳性血清进行的Western印迹分析(pH 4-7)的结果;左下图6-3显示了粉尘螨的2-D(二维)电泳图样(pH 3.9-5.1);右下图6-4显示了与2-D(二维)电泳图样相比,用发生特应性皮炎的狗患者的粉尘螨阳性血清进行的Western印迹分析(pH 3.9-5.1)获得的反应斑点(斑点在图的上部表现为黑色的圆形斑点,并且用箭头表示)。用箭头表示的斑点观察到了强反应。
[实施例5]Zen1蛋白的蛋白组分析
从凝胶上切下通过2-D(二维)电泳分离的Zen1蛋白斑点,然后进行MS/MS分析。可以获得大量MS/MS数据,但是没有证实任何命中。对5种认为是新蛋白的肽进行了从头测序法,由此确定了氨基酸序列(SEQ ID NOS:3-7)(表1)。对这些氨基酸序列进行了BLAST检索,但没有获得明确的命中。
表1
部分序列415部分序列445部分序列847部分序列448部分序列491 | MKSLLNEANELLKSAQDVLEKFMQSLLNEADELLRLPDSDLKDELAKLPDSDLKNELAEK |
通过从头测序法确定的Zen1的部分氨基酸序列
[实施例6]Zen1蛋白的肽作图分析
从凝胶上切下通过2-D(二维)电泳分离的Zen1蛋白斑点。制备肽图谱,然后进行8个峰的氨基酸测序。结果,确定了11个氨基酸片段的序列(SEQ ID NOS:8-18)(表2)。进行了BLAST检索,但没有获得明确的命中。
表2
部分序列21部分序列28部分序列32部分序列23-1部分序列23-2部分序列24部分序列22部分序列9-1部分序列9-2部分序列20-1部分序列20-2 | MYNFHLEAYIAHFLELEIAHFELEKFQSLLNEANIAHLESE(T)KFQSLLN(E)ADAQLEXESAQDVSLRNEMNEMFQSLLNKADFDDLARDVXL |
通过Zen1的肽作图获得的相应于峰的氨基酸序列
[实施例7]分析Zen1蛋白的N-末端氨基酸序列
从凝胶上切下通过2-D(二维)电泳分离的Zen1蛋白斑点。采用HP G1005A蛋白测序系统,通过标准方法确定Zen1蛋白的N-末端氨基酸序列(SEQ ID NO:19)(表3)。对序列进行了BLAST检索,但没有获得明确的命中。
表3
N-末端序列 | DNRDDVLKQTEE |
Zen1 N-末端氨基酸序列
[实施例8]提取螨总RNA和分离螨poly(A)mRNA
根据标准方法通过培养和生长粉尘螨而获得的未处理的螨体置于大约2.0L饱和盐溶液中。充分搅拌溶液,然后静置30分钟。用粗滤器撇出上清液中的螨体,用生理盐水清洗,然后干燥。将1.0g螨体进行总RNA提取,用FastTrack 2.0试剂盒(由Invitrogen生产),根据试剂盒的手册分离螨poly(A)mRNA。
[实施例9]合成螨cDNA
用100ng实施例8中分离的螨poly(A)mRNA作为模板,并且采用cDNA合成试剂盒(ReverTraAce-α-;由Toyobo生产),根据试剂盒的手册进行逆转录反应。
[实施例10]通过PCR扩增Zen1基因
根据Zen1蛋白的N-末端氨基酸序列,将引物N-1(5’-GAYGAYGTNTTRAARCARACNGARGAR-3’(SEQ ID NO:20):Y=C或T,N=A或C或G或T,并且R=A或G)和N-2(5’-GAY GAYGTN CTN AAR CAR ACN GAR GAR-3’(SEQ ID NO:21):Y=C或T,N=A或C或G或T,并且R=A或G)设计为有义引物。此外,根据作为反向引物的通过从头测序方法获得的氨基酸序列(表4),设计12个引物(SEQ ID NOS:22-33)。采用作为模板的1.0μg实施例9中合成的螨cDNA、Ex taq聚合酶(由TaKaRa Bio生产)和根据手册制备的每个样品,在94℃下进行热变性处理2分钟,并且进行35个循环的反应,每个循环由94℃下1分钟,65℃下2分钟,和72℃下3分钟组成。在72℃下进行9分钟的进一步反应后,在4℃储存样品。当用反向引物415-4(5’-RTTNAGNAGRTCYTTNGCRTCYTT-3’(SEQ ID NO:25):N=A或C或G或T,R=A或G,并且Y=C或T)进行PCR时,获得了大约1,000bp的DNA片段。当用491-2(5’-RTT RTC NGC NAG RTCYTT RTT-3’(SEQ ID NO:29):N=A或C或G或T,R=A或G,并且Y=C或T)进行PCR时,获得了大约880bp的DNA片段。
表4
N-1N-2415-1415-2415-3415-4445-1445-2491-1491-2448-1448-2448-3448-4 | 5’-GAY GAY GTN TTR AAR CAR ACN GAR GAR-3’5’-GAY GAY GTN CTN AAR CAR ACN GAR GAR-3’5’-RTT RAA RAA RTC YTT NGC RTC YTT RAA-3’5’-RTT NAG RAA RTC YTT NGC RTC YTT-3’5’-RTT RAA NAG RTC YTT NGC RTC YTT-3’5’-RTT NAG NAG RTC YTT NGC RTC YTT-3’5’-RTT RTC RAA NAC YTC RTG NGC-3’5’-RTT RTC NAG NAC YTC RTG NGC-3’5’-RTT RTC NGC RAA RTC YTT RTT-3’5’-RTT RTC NGC NAG RTC YTT RTT-3’5’-RTT NGC RAA RTC YTC RTT RAA YTC-3’5’-RTT NGC NAG RTC YTC RTT RAA YTC-3’5’-RTT NGC RAA RTC YTC RTT NAG YTC-3’5’-RTT NGC NAG RTC YTC RTT NAG YTC-3’ |
合成用于扩增Zen1基因的混合引物序列。当用N-1和415-4进行PCR时,获得了大约1000bp的片段。当用N-1和491-2进行PCR时,获得了大约880bp的片段。
N=A或C或G或T,R=A或G,Y=C或T
[实施例11]克隆Zen1基因
从琼脂糖凝胶(SUPREC-01,由TaKaRa生产)收集用实施例10中的引物N-1和415-4扩增的DNA片段。用T4 DNA连接酶将DNA片段连接到pGEM-T Easy载体(由Promega生产)的克隆位点,从而转化宿主大肠杆菌TOP10(由Invitrogen生产)。具体地,混合大肠杆菌感受态细胞和质粒,然后在冰上对混合物进行温度处理大约30分钟,42℃下30秒,然后在冰上2分钟。然后将所得物悬浮于SOC培养基(2%Trypton,0.5%酵母提取物,0.05% NaCl,10mM MgCl2,10mMMgSO4,和20mM葡萄糖),然后37℃下温育1小时。随后,在补加了50μg/ml氨苄青霉素的LB琼脂培养基(1%酵母提取物,0.5% trypton和1% NaCl)上37℃下将转化的大肠杆菌培养过夜,从而获得大肠杆菌菌落。选择认为含有插入的片段的白色克隆。在补加了50μg/ml氨苄青霉素的LB培养基上培养克隆过夜。用GFX(商标)Micro PlasmidPrep试剂盒(由Amersham Bioscience生产)纯化质粒DNA。用染料引物循环测序试剂盒(由Amersham生产)进行测序反应,然后用荧光DNA测序仪(由Shimadzu Corporation生产)进行核苷酸序列分析。此外,当发现3个克隆的核苷酸序列在其核苷酸序列分析时完全匹配时,进行最终的确定(图7-1和图7-2)。
[实施例12]分析Zen1基因
用Genetyx-win ver.6软件(由Software Development生产)分析实施例11中克隆的Zen1基因。碱基的数目是1020bp,氨基酸残基的数目是340(图7-1,图7-2,和SEQ ID NOS:1和2)。对基因的核苷酸序列和氨基酸序列进行了BLAST检索,但是没有获得明确的命中。Zen1基因被认为是新基因。
[实施例13]分离全长Zen1 cDNA
通过RACE(cDNA末端的快速扩增)法分离全长cDNA。采用SV总RNA分离试剂盒(由Promega生产),从实施例8中使用的螨体提取总RNA。用GeneRacer(商标)试剂盒,根据试剂盒的手册制备RACE的模板。此外,基于实施例12中获得的Zen1部分序列,合成了第一轮PCR和嵌套式PCR的引物,用于扩增5’和3’末端(表5)。5’和3’末端的扩增反应按如下进行。在1.0μL根据上文制备的RACE模板中加入包含在GeneRacer(商标)试剂盒中的5’和3’引物各3.0μL,1.0μLdNTP混合物溶液(各10mM),包含在Advantage cDNA聚合酶混合物(由CLONTECH生产)中的5.0μl 10×cDNA PCR反应缓冲液,1.0μLAdvantage cDNA聚合酶混合物,和按上文所述合成并且调节在10μM的第一轮PCR的基因特异性引物各1.0μL。然后用无菌蒸馏水将得到的溶液的体积调节到50.0μL。用Touchdown PCR法进行基因扩增。制备的样品溶液在94℃下热变性1分钟,进行5轮反应,每轮由94℃下30秒和72℃下4分钟组成,进行5轮反应,每轮由94℃下30秒和70℃下4分钟组成,进行25轮最终反应,每轮由94℃下30秒和68℃下4分钟组成,然后在4℃下储存。完成第一轮PCR后,向5’和3’末端扩增反应溶液各1.0mL中加入包含在GeneRaeer(商标)试剂盒中的嵌套式PCR的5’引物和3’引物各1.0μL,1.0μL dNTP混合物溶液(各10mM),包含在Advantage cDNA聚合酶混合物(由CLONTECH生产)中的5.0μl 10×cDNA PCR反应缓冲液,1.0μL Advantage cDNA聚合酶混合物,和按上文所述合成并且调节在10μM的第一轮PCR的基因特异性引物各1.0μL。然后用无菌蒸馏水将得到的溶液的体积调节到50.0μL。用上述Touchdown PCR法进行基因扩增。采用1.0%琼脂糖凝胶,通过电泳证实由此获得的扩增的5’和3’末端的片段。切下这些片段,然后收集(SUPREC-01,由TaKaRa生产)。用T4 DNA连接酶将片段连接到pGEM-T Easy载体(由Promega生产)的克隆位点,从而转化宿主大肠杆菌TOP10(由Invitrogen生产)。具体地,混合大肠杆菌感受态细胞和质粒,然后在冰上对混合物进行温度处理大约30分钟,42℃下30秒,然后在冰上2分钟。然后将所得物悬浮于SOC培养基(2% Trypton,0.5%酵母提取物,0.05% NaCl,10mM MgCl2,10mM MgSO4,和20mM葡萄糖),然后37℃下温育1小时。随后,在补加了50μg/ml氨苄青霉素的LB琼脂培养基(1%酵母提取物,0.5%trypton和1% NaCl)上37℃下将转化的大肠杆菌培养过夜,从而获得大肠杆菌菌落。选择认为含有插入的片段的白色克隆。在补加了50μg/ml氨苄青霉素的LB培养基上培养克隆过夜。用GFX(Trademark)Micro Plasmid Prep试剂盒(由Amersham Bioscience生产)纯化质粒DNA。用染料引物循环测序试剂盒(由Amersham生产)进行测序反应,然后用荧光DNA测序仪(由Shimadzu Corporation生产)进行核苷酸序列分析。此外,当发现3个克隆的核苷酸序列在其分析时完全匹配时,进行最终的确定。结果,可以确定Zen1的5’末端和3’末端的核苷酸序列(图8-1-图8-4,和SEQ ID NOS:34和35)。
表5
引物名称 | 序列 | 使用目的 |
Zen1 RS-1Zen1 RS-2Zen1 RR-1Zen1 RR-2 | 5’-AAT TAC AAA CAT GAG TTA GAA-3’5’-GAA TTG TTG ACA ATG TTC AAA-3’5’-GAT TTC ATC TTT CAA ATC TGA-3’5’-CTT TTC CAA TAC ATC CTG GGC-3’ | 3’RACE 1st PCR3’RACE嵌套式PCR5’RACE 1st PCR5’RACE嵌套式PCR |
(从上到下,SEQ ID NOS:36、37、38和39)
用于RACE法的引物及其序列
[实施例14]纯化重组Zen1
通过PCR扩增实施例13获得的、添加了限制酶BamHI和XhoI位点的Zen1 cDNA。用T4-DNA连接酶将扩增产物连接到大肠杆菌表达质粒载体pGEX4T-1(由Amersham Biosciences生产)的EcoR I和Xho I位点。用由此获得的重组质粒转化大肠杆菌TOP10菌株(由Invitrogen生产)。在含有100μg/mL氨苄青霉素的LB培养基中将转化的菌株37℃下培养过夜。随后,在新的LB培养基上传代培养小量菌株,直到600nm处的OD值达到1.0。添加IPTG(异丙基-1-硫-β-D-半乳糖苷),达到1mM的终浓度。3小时后,收获细胞,然后用PBS(pH7.4)清洗一次。通过在PBS(pH 7.4)中超声处理而裂解再次收获的细胞,通过离心除去不溶的级份,然后收集含有与谷胱甘肽S-转移酶(GST)融合的Zen1的可溶级份。随后,用谷胱甘肽琼脂糖凝胶4B柱(由Amersham Biosciences生产)从可溶级份获得与GST融合的Zen1。将含量为融合蛋白的1/100的凝血酶(由Amersham Biosciences生产)加入含有纯化的融合产物(即,融合于GST的Zen1)的溶液,然后在22℃下反应20小时。由此,GST从Zen1分离。随后,用Benzamidin琼脂糖凝胶(由Amersham Biosciences生产)除去凝血酶,然后纯化重组的Zen1。由此获得的纯化的Zen1表现出相应于分子量为大约60kDa的单个条带,这是通过SDS-PAGE证实的(图9)。
[实施例15]制备抗Zen1多克隆抗体和分析抗体与螨蛋白的反应性
以1周的间隔用实施例14纯化的重组Zen1免疫6只小鼠(BALB/c,雌性,4周龄)5次。随后,从小鼠采集血液,分离血清,然后通过ELISA分析IgG抗体的反应。按如下进行ELISA。将1.0μg重组Zen1和4.0μg从粉尘螨提取的抗原(由GREER生产)分别固定在免疫板(由NalgeNunc International生产)上,然后在37℃下用封闭溶液(通过将Tween20加入补加了10% FBS的PBS中达到0.05%的终浓度而制备)封闭1小时。用封闭溶液将每个小鼠血清样品稀释1000倍,然后在室温下反应1小时。清洗每个免疫板后,使其与用封闭溶液稀释2000倍的HRP标记的山羊抗小鼠IgG单克隆抗体(由ZYMED生产)反应。清洗每个免疫板后,将100μL酶底物溶液(ABTS溶液)加入每个孔,然后在37℃下反应10分钟。通过向每个孔中加入100μL 0.32%的氟化钠溶液而终止酶反应。用免疫读数器(BioRad)测量414nm处每个孔的吸光度。用ELISA证实IgG与相关受试物的反应后,确定受试物是抗Zen1的多克隆抗体。
通过Western印迹分析小鼠IgG与多克隆抗体(重组Zen1)的反应性和关于螨体的该反应性。将β-巯基乙醇加入100.0μL调节到50μg/mL的重组Zen1蛋白溶液和100.0μL从粉尘螨提取的抗原的溶液,达到50.0μL/mL的终浓度,由此制备200μL Laemmli样品缓冲液(由BIO-RAD生产)。100℃下热处理5分钟,然后将所得物加样到凝胶浓度为5%-20%的聚丙烯酰胺凝胶(PAGEL;由ATTO生产)上。由此进行电泳。完成电泳后,将所得物转移到PVDF膜(Hybond-P;由Amersham Biosciences生产)。使膜在封闭溶液(补加了5%脱脂奶的PBST(通过将Tween20添加到PBS中达到0.1%的终浓度而制备))中4℃下静置过夜。在PBST中将膜清洗10分钟。用PBST将HRP标记的山羊抗小鼠IgG单克隆抗体(由ZYMED生产)稀释2000倍,然后将稀释的溶液加入膜,随后在室温下反应2小时。用PBST清洗5次(每次10分钟)后,将ECL Plus Western印迹检测系统(由AmershamBiosciences生产)的反应溶液加入到膜上,然后在室温下反应5分钟。用X射线膜(Hyperfilm ECL;由Amersham Biosciences生产)检测信号。结果,检测到了表示与分子量为大约60kDa的重组Zen1反应的信号和表示与分子量为150kDa-250kDa的天然型Zen1反应的信号(图10)。因此,证实了实施例13分离的全长Zen1 cDNA编码分子量为150kDa-250kDa的螨体的所述变应原蛋白。
[实施例16]分析重组Zen1的IgE反应性
通过ELISA评估实施例14中纯化的重组Zen1的变应原性。将1.0μg重组Zen1固定在免疫板(由Nalge Nunc International K.K.生产)上,然后在37℃下用封闭溶液(通过将Tween20加入补加了10% FBS的PBS中达到0.05%的终浓度而制备)封闭1小时。使检测的粉尘螨阳性的9只狗的血清(通过用生理盐水稀释50倍的粉尘螨抗原溶液(由GREER生产)进行皮内反应证实为粉尘螨阳性的狗血清)与阴性对照狗血清反应。加入生物素标记的GST-FcεRIα,然后,通过添加过氧化物酶偶联的链亲和素(由Jackson Immuno Research生产)和酶底物溶液(ABTS溶液)导致显色反应。通过向每个孔中加入100μL 0.32%的氟化钠溶液而终止酶反应。用免疫读数器(BioRad)测量414nm处每个孔的吸光度。具体地,用重组的狗FcεRIα,通过ELISA系统分析血清IgE(9只通过该程序的皮内反应证实的测试为螨阳性的狗的血清,或阴性狗(对照)的血清)与重组Zen1的反应。结果,证实了高于阴性狗的值(用虚线表示)的值。因此,证实了重组Zen1是与IgE反应的变应原蛋白(图11)。
工业实用性
本发明使得能够提供作为螨变态反应性疾病的治疗剂或预防剂的安全和有效的重组螨变应原,其不含诱导过敏的杂质。
在此全文引入在此引用的所有公开文献作为参考。本领域技术人员容易理解,本发明的多种修饰和改变在所附权利要求公开的技术思想和发明范围内是可实现的。本发明意欲包括所述修饰和改变。
序列表
<110>NIPPON ZENYAKU KOGYO LTD.
<120>新的螨变应原
<130>PH-2409-PCT
<150>JP2004-116089
<151>2004-04-09
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Pro Glu Pro Thr Thr Pro Thr Pro Glu Pro Thr Thr Lys Thr Pro Glu
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ccg act acc aaa aca ccg gaa cca aca aca cca act cca gaa ccg act 528
Pro Thr Thr Lys Thr Pro Glu Pro Thr Thr Pro Thr Pro Glu Pro Thr
165 170 175
acc aaa aca ccg gaa cca aca aca cca act cct gaa ccg act acc aaa 576
Thr Lys Thr Pro Glu Pro Thr Thr Pro Thr Pro Glu Pro Thr Thr Lys
180 185 190
acc ccc gaa ccg act acc aaa aca cct gaa cca tcc acc cca act ccg 624
Thr Pro Glu Pro Thr Thr Lys Thr Pro Glu Pro Ser Thr Pro Thr Pro
195 200 205
gac cgc tac caa aac ccc cga ccg cta cca aaa cac cgg acc atc cac 672
Asp Arg Tyr Gln Asn Pro Arg Pro Leu Pro Lys His Arg Thr Ile His
210 215 220
ccc aac tcc gga ccg act acc aaa aca cct gaa cca tcc act cca act 720
Pro Asn Ser Gly Pro Thr Thr Lys Thr Pro Glu Pro Ser Thr Pro Thr
225 230 235 240
ccg gaa ccg act acc aaa acc ccc gaa ccg act acc aaa aca ccg gaa 768
Pro Glu Pro Thr Thr Lys Thr Pro Glu Pro Thr Thr Lys Thr Pro Glu
245 250 255
cca tca acc cca act ccg gaa ccg act acc aaa aca ccg gaa cca tca 816
Pro Ser Thr Pro Thr Pro Glu Pro Thr Thr Lys Thr Pro Glu Pro Ser
260 265 270
acc cca act ccg gaa ccg act acc aaa aca ccg gaa cca tca acg act 864
Thr Pro Thr Pro Glu Pro Thr Thr Lys Thr Pro Glu Pro Ser Thr Thr
275 280 285
aag aaa cct aat cgg gat gat gtt ttg aaa caa gct gaa gag ctt att 912
Lys Lys Pro Asn Arg Asp Asp Val Leu Lys Gln Ala Glu Glu Leu Ile
290 295 300
aaa aga gcc gag gat gta ttt gaa aag ttg ccc gat tca gat ttg aaa 960
Lys Arg Ala Glu Asp Val Phe Glu Lys Leu Pro Asp Ser Asp Leu Lys
305 310 315 320
aat gaa atc gca gaa aaa ctg gca acc atg aag aat tac aaa cat gag 1008
Asn Glu Ile Ala Glu Lys Leu Ala Thr Met Lys Asn Tyr Lys His Glu
325 330 335
tta gaa aat gca aaa aat cca atc aaa atc gcc cat ctt gaa tcg gaa 1056
Leu Glu Asn Ala Lys Asn Pro Ile Lys Ile Ala His Leu Glu Ser Glu
340 345 350
ttg ttg aca atg ttc aaa atg ttc caa tca ttg ttg aac gaa gct gat 1104
Leu Leu Thr Met Phe Lys Met Phe Gln Ser Leu Leu Asn Glu Ala Asp
355 360 365
gaa att atc aga tcc ttg aca act acg acg gaa ccg aca aca ttg aat 1152
Glu Ile Ile Arg Ser Leu Thr Thr Thr Thr Glu Pro Thr Thr Leu Asn
370 375 380
agc acc act ccg gaa ccg aca aca ttg aat agc acc act ccg gaa ccg 1200
Ser Thr Thr Pro Glu Pro Thr Thr Leu Asn Ser Thr Thr Pro Glu Pro
385 390 395 400
aca aca ttg aat agc acc act ccg gaa ccg aca aca ttg aat agc acc 1248
Thr Thr Leu Asn Ser Thr Thr Pro Glu Pro Thr Thr Leu Asn Ser Thr
405 410 415
act ccg gaa ccg aca aca ttg aat agc acc act ccg gga ccg aca aca 1296
Thr Pro Glu Pro Thr Thr Leu Asn Ser Thr Thr Pro Gly Pro Thr Thr
420 425 430
ttg aat agc acc act ccg gaa ccg aca aca ttg aat agc acc act ccg 1344
Leu Asn Ser Thr Thr Pro Glu Pro Thr Thr Leu Ash Ser Thr Thr Pro
435 440 445
gaa ccg aca aca ttg aat agc acc act ccg gaa ccg aca aca tcg aat 1392
Glu Pro Thr Thr Leu Asn Ser Thr Thr Pro Glu Pro Thr Thr Ser Asn
450 455 460
agc acc act tca gaa cca acg aat tca atc aat aga aaa aca agt gaa 1440
Ser Thr Thr Ser Glu Pro Thr Asn Ser Ile Asn Arg Lys Thr Ser Glu
465 470 475 480
ttt cat tct tat ccg att ggt tcc ata aga ttc gaa tca gat tca ata 1488
Phe His Ser Tyr Pro Ile Gly Ser Ile Arg Phe Glu Ser Asp Ser Ile
485 490 495
ttt tct aaa cat ttt att ctt ttg att tga 1518
Phe Ser Lys His Phe Ile Leu Leu Ile
500 505
<210>35
<211>505
<212>PRT
<213>粉尘螨
<400> 35
Met Lys Leu Thr Ala Thr Leu Leu Leu Ile Leu Thr Leu Ser Trp Ala
1 5 10 15
Gly Ile Phe Val Asp Ala Asn Pro Arg Phe Lys Arg Asp Asn Arg Asp
20 25 30
Asp Val Leu Lys Gln Thr Glu Glu Leu Ile Lys Ser Ala Gln Asp Val
35 40 45
Leu Glu Lys Leu Pro Asp Ser Asp Leu Lys Asp Glu Ile Ala Glu Lys
50 55 60
Leu Ala Thr Met Lys His Tyr Lys His Lys Leu Glu Asn Ala Lys Asn
65 70 75 80
Pro Ile Lys Ile Ala His Phe Glu Leu Glu Leu Leu Thr Met Phe Lys
85 90 95
Lys Phe Gln Ser Leu Leu Asn Glu Ala Asn Glu Ile Ile Lys Ser Leu
100 105 110
Thr Thr Thr Thr Thr Glu Pro Thr Thr Pro Thr Pro Glu Pro Thr Thr
115 120 125
Thr Thr Pro Glu Pro Thr Thr Lys Thr Pro Glu Pro Thr Thr Lys Thr
130 135 140
Pro Glu Pro Thr Thr Pro Thr Pro Glu Pro Thr Thr Lys Thr Pro Glu
145 150 155 160
Pro Thr Thr Lys Thr Pro Glu Pro Thr Thr Pro Thr Pro Glu Pro Thr
165 170 175
Thr Lys Thr Pro Glu Pro Thr Thr Pro Thr Pro Glu Pro Thr Thr Lys
180 185 190
Thr Pro Glu Pro Thr Thr Lys Thr Pro Glu Pro Ser Thr Pro Thr Pro
195 200 205
Asp Arg Tyr Gln Ash Pro Arg Pro Leu Pro Lys His Arg Thr Ile His
210 215 220
Pro Asn Ser Gly Pro Thr Thr Lys Thr Pro Glu Pro Ser Thr Pro Thr
225 230 235 240
Pro Glu Pro Thr Thr Lys Thr Pro Glu Pro Thr Thr Lys Thr Pro Glu
245 250 255
Pro Ser Thr Pro Thr Pro Glu Pro Thr Thr Lys Thr Pro Glu Pro Ser
260 265 270
Thr Pro Thr Pro Glu Pro Thr Thr Lys Thr Pro Glu Pro Ser Thr Thr
275 280 285
Lys Lys Pro Asn Arg Asp Asp Val Leu Lys Gln Ala Glu Glu Leu Ile
290 295 300
Lys Arg Ala Glu Asp Val Phe Glu Lys Leu Pro Asp Ser Asp Leu Lys
305 310 315 320
Asn Glu Ile Ala Glu Lys Leu Ala Thr Met Lys Asn Tyr Lys His Glu
325 330 335
Leu Glu Asn Ala Lys Asn Pro Ile Lys Ile Ala His Leu Glu Ser Glu
340 345 350
Leu Leu Thr Met Phe Lys Met Phe Gln Ser Leu Leu Asn Glu Ala Asp
355 360 365
Glu Ile Ile Arg Ser Leu Thr Thr Thr Thr Glu Pro Thr Thr Leu Asn
370 375 380
Ser Thr Thr Pro Glu Pro Thr Thr Leu Asn Ser Thr Thr Pro Glu Pro
385 390 395 400
Thr Thr Leu Asn Ser Thr Thr Pro Glu Pro Thr Thr Leu Asn Ser Thr
405 410 415
Thr Pro Glu Pro Thr Thr Leu Asn Ser Thr Thr Pro Gly Pro Thr Thr
420 425 430
Leu Asn Ser Thr Thr Pro Glu Pro Thr Thr Leu Asn Ser Thr Thr Pro
435 440 445
Glu Pro Thr Thr Leu Asn Ser Thr Thr Pro Glu Pro Thr Thr Ser Asn
450 455 460
Ser Thr Thr Ser Glu Pro Thr Asn Ser Ile Asn Arg Lys Thr Ser Glu
465 470 475 480
Phe His Ser Tyr Pro Ile Gly Ser Ile Arg Phe Glu Ser Asp Ser Ile
485 490 495
Phe Ser Lys His Phe Ile Leu Leu Ile
500 505
<210>36
<211>21
<212>DNA
<213>人工序列
<220>
<223>人工序列说明:引物
<400>36
aattacaaac atgagttaga a 21
<210>37
<211>21
<212>DNA
<213>人工序列
<220>
<223>人工序列说明:引物
<400>37
gaattgttga caatgttcaa a 21
<210>38
<211>21
<212>DNA
<213>人工序列
<220>
<223>人工序列说明:引物
<400>38
gatttcatct ttcaaatctg a 21
<210>39
<211>21
<212>DNA
<213>人工序列
<220>
<223>人工序列说明:引物
<400>39
cttttccaat acatcctggg c 21
Claims (21)
1.以下重组螨变应原(a)或(b):
(a)包含SEQ ID NO:2所示氨基酸序列的重组螨变应原;或
(b)包含通过对SEQ ID NO:2所示氨基酸序列缺失、取代或添加一个或几个氨基酸而得到的氨基酸序列,并且具有螨变应原活性的重组螨变应原。
2.以下重组螨变应原(a)或(b):
(a)包含SEQ ID NO:35所示氨基酸序列的重组螨变应原;或
(b)包含通过对SEQ ID NO:35所示氨基酸序列缺失、取代或添加一个或几个氨基酸而得到的氨基酸序列,并且具有螨变应原活性的重组螨变应原。
3.编码以下螨变应原(a)或(b)的基因:
(a)包含SEQ ID NO:2所示氨基酸序列的螨变应原;或
(b)包含通过对SEQ ID NO:2所示氨基酸序列缺失、取代或添加一个或几个氨基酸而得到的氨基酸序列,并且具有螨变应原活性的螨变应原。
4.编码以下螨变应原(a)或(b)的基因:
(a)包含SEQ ID NO:35所示氨基酸序列的螨变应原;或
(b)包含通过对SEQ ID NO:35所示氨基酸序列缺失、取代或添加一个或几个氨基酸而得到的氨基酸序列,并且具有螨变应原活性的螨变应原。
5.包含以下DNA(c)或(d)的基因:
(c)包含SEQ ID NO:1所示核苷酸序列的DNA;或
(d)在严格条件下与包含特定序列的DNA杂交,并且编码具有螨变应原活性的蛋白的DNA,所述特定序列与包含SEQ ID NO:1所示核苷酸序列的DNA的序列互补。
6.包含以下DNA(c)或(d)的基因:
(c)包含SEQ ID NO:34所示核苷酸序列的DNA;或
(d)在严格条件下与包含特定序列的DNA杂交,并且编码具有螨变应原活性的蛋白的DNA,所述特定序列与包含SEQ ID NO:34所示核苷酸序列的DNA的序列互补。
7.权利要求1或2的螨变应原的片段肽。
8.权利要求7的片段肽,其包含含有SEQ ID NO:3-SEQ ID NO:19所示氨基酸序列中的至少一个序列的氨基酸序列。
9.螨变应原的片段基因,其编码权利要求7或8的片段肽。
10.重组载体,其包含权利要求3-6的任意一项的基因或权利要求9的片段基因。
11.融合蛋白,其由权利要求1或2的螨变应原和另一种蛋白组成。
12.用权利要求10的表达载体转化的细茵、酵母、昆虫或动物细胞。
13.生产重组螨变应原的方法,该方法包括在可以表达基因的条件下培养权利要求12的细菌、酵母、昆虫或动物细胞,导致细胞产生重组螨变应原,然后收获重组螨变应原。
14.生产重组螨变应原的方法,该方法包括在可以表达基因的条件下培养权利要求12的细菌、酵母、昆虫或动物细胞,导致细胞产生融合重组螨变应原,收获融合重组螨变应原,然后除去与变应原融合的另一种蛋白。
15.螨变态反应性疾病的治疗剂,其含有权利要求1或2的重组螨变应原、权利要求7的片段肽或权利要求11的融合蛋白作为活性成分。
16.螨变态反应性疾病的诊断剂,其含有权利要求1或2的重组螨变应原、权利要求7的片段肽或权利要求11的融合蛋白作为活性成分。
17.权利要求1或2的抗螨变应原的抗体。
18.权利要求17的抗螨变应原的抗体,其是单克隆抗体。
19.杂交瘤,其产生权利要求18的单克隆抗体。
20.屋尘中的螨变应原的免疫测定方法,其使用权利要求17-19的任意一项的抗体。
21.权利要求20的屋尘中的螨变应原的免疫测定方法,其是ELISA法。
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JP2004116089 | 2004-04-09 | ||
JP116089/2004 | 2004-04-09 | ||
PCT/JP2005/007191 WO2005097996A1 (ja) | 2004-04-09 | 2005-04-07 | 新規ダニアレルゲン |
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CN2011104584107A Division CN102516383A (zh) | 2004-04-09 | 2005-04-07 | 新的螨变应原 |
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CN2011104584107A Pending CN102516383A (zh) | 2004-04-09 | 2005-04-07 | 新的螨变应原 |
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US (3) | US8075898B2 (zh) |
EP (1) | EP1743941B1 (zh) |
JP (1) | JP4733022B2 (zh) |
KR (1) | KR101222496B1 (zh) |
CN (2) | CN1997741B (zh) |
AU (1) | AU2005231004B2 (zh) |
CA (1) | CA2563887C (zh) |
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CN107001434A (zh) * | 2014-12-02 | 2017-08-01 | 大鹏药品工业株式会社 | 新型粉尘螨蛋白质 |
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ES2494817T3 (es) * | 2004-04-09 | 2014-09-16 | Nippon Zenyaku Kogyo Co., Ltd. | Nuevo alérgeno de ácaro |
CN106146640B (zh) * | 2016-05-31 | 2019-10-22 | 深圳大学 | 尘螨变应原及其应用 |
JP7341138B2 (ja) * | 2017-07-31 | 2023-09-08 | レティ・ファルマ・ソシエダ・リミタダ | 動物用製品 |
EP3831401A4 (en) * | 2018-06-22 | 2022-04-20 | Zonhon Biopharma Institute, Inc. | DRUG BLEND BASED ON RECOMBINANT ALLERGEN PROTEINS OF MITES AND THE USE OF THEREOF |
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JP2596466B2 (ja) | 1990-03-03 | 1997-04-02 | アサヒビール株式会社 | ダニの主要アレルゲンの還伝情報を有するdnaおよび該アレルゲンの製造方法 |
JP3139777B2 (ja) * | 1990-08-27 | 2001-03-05 | フマキラー株式会社 | 組換えダニアレルゲン |
KR100274321B1 (ko) | 1990-09-11 | 2000-12-15 | 스미드 이. 그레이엄 | 데르마토파고이디즈(집 먼지 진드기)의 알레르기 항원의 클로닝 및 서열결정 |
US20010014457A1 (en) * | 1994-07-22 | 2001-08-16 | Eliot R. Spindel | Nucleic acids encoding receptors for bombesin-like peptides |
US7101664B2 (en) * | 1999-12-22 | 2006-09-05 | Polymun Scientific Immunbiologische Forschung Gmbh | Bioactive oligopeptides |
ES2494817T3 (es) * | 2004-04-09 | 2014-09-16 | Nippon Zenyaku Kogyo Co., Ltd. | Nuevo alérgeno de ácaro |
EP2221062B1 (en) | 2007-11-02 | 2014-05-21 | Nippon Zenyaku Kogyo Co., Ltd. | Novel adjuvant |
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EP1743941A1 (en) | 2007-01-17 |
AU2005231004A1 (en) | 2005-10-20 |
AU2005231004B2 (en) | 2011-06-02 |
CN102516383A (zh) | 2012-06-27 |
US8075898B2 (en) | 2011-12-13 |
CA2563887A1 (en) | 2005-10-20 |
EP1743941B1 (en) | 2014-06-04 |
KR20070002082A (ko) | 2007-01-04 |
WO2005097996A1 (ja) | 2005-10-20 |
KR101222496B1 (ko) | 2013-01-15 |
ES2494817T3 (es) | 2014-09-16 |
US8647630B2 (en) | 2014-02-11 |
CA2563887C (en) | 2013-09-17 |
US20080260759A1 (en) | 2008-10-23 |
JPWO2005097996A1 (ja) | 2008-02-28 |
CN1997741B (zh) | 2012-08-22 |
US20120289679A1 (en) | 2012-11-15 |
US20140080997A1 (en) | 2014-03-20 |
EP1743941A4 (en) | 2008-02-13 |
JP4733022B2 (ja) | 2011-07-27 |
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